Office



Al. F. BOWERY.

`CONVliYl-R BELT.

APPLxcATIoN man mms. 1915A.

mmm Aug. 15, 1916.

"WILLAM E'. B'WERS, OF SAN FRANCISCQ, CALXFGELEILFA.'

converse-entr Specification of Letters Patent.

zum

Patented nog .application filed July 6, 1935. Serial No. 385292.

To @ZZ whom 'it may conce-m.' p Y Be it known that WiLLrAM F. BOWERS, a citizen of the United States, residing in theI ity and county of San Francisco and State of California, have invented certaiin are delivered onto tbe surface of the upperr run of an endless traveling conveyor belt, and where the conveyerbelt is composed of composite material, such as rubber and teX- tile fabric, the fall or deposit of the Waste material or tailings-onto the surface of the conveyor belt, together with the frictional Wear thereon caused by the slippage of the material beingconveyed to a point of 'discharge, (usually at an elevation) quickly Wears the upper face of the belt to such an extent as to destroy the usefulness of tbe same for effective Work as a conveyor. Various means have been employed to overcome this defect incident to composite conveyer belts for tlie purpose of prolongin the life and` usefulness thereof for ecctive 'orlring purposes. vone of the means thus employed being; disclosed by United States Letters Patent No. Sli/416; granted d.' J. lf'oorhces under date of March 6, '1906. llnder the invention Aof said Letters Patent there is provided a composite conveyer belt composed of rubber having embedded there in iiorizontul layers of textile fabric which serve to give longitudinal strength to the belt and reinforcement for the under sur face or pulley surfaceof the belt. The upper face or Wearing surface of the belt has embedded in the rubber tliereof a series of lon gitudinally disposed layers of yfabric set edgewise or in a plane perpendicular to the horizontal layers of fabric, each of the said perpendicular layers being scparated'bv the rubber or cementing material of tliebclt or conveyor. dlliile under s ucli.acOnStruced conveyor the perpemlicular layers o3 l materially prolongs the life of the conveyor by offering agreatcr resistance against wear, lue to the fact that the wear and tear takes place upon the ends only of said textile or fabric layers. However, practice has disclosed that in the use of such constructed belt the lateral contractiony and expansion which takes place during the troughiirg` Jperiods of the conveyor as carried over the supporting pulleys tends to and does cause a Separation or tearing` apart of the 'vertically or perpendicularly disposed. longitudinal. layers to such an extent as to cause the maw terial on the surface of the belt to gradually' Work and settle between the separated faces of said layers, ivliich results in a compa-ra tive quick Wearing of the upper surface of the conveyer belt. it is 'this defect in the recognized composite conveyor belt provided With an upper wear surface which tlie' present invention successfully overcomes,

and byvso doing materiallyprclonzggfingthe life thereofand necessarily its working, eiliciency, and materially reducing the expense as to the upkeep of the composite conveyor belts.

To comprehend the invention, reference should be had to the accompanying drawings, wherein- Figure l is a perspective view of the body of the composite conveyor belt. Figu 2 is a similar view of the improved Wearing sur facafor the conveyor belt. Fig. 3 is a sectional elevation of the conveyer belt with the parts assembled. Fig. lis a top plan view of the conveyer belt. Fig. 5 an enlarged broken detail end elevation of the united inclined wear layers for tlie conw-xyer belt.

ln the drawings, the numeral l tho body proper of the improved indicates 'cs'.nvrnf'er belt, the same comprising rubber baringr enralli is secured, so as to constitute an integral Y portion ofthe. belt, a wear surface el, which is disposed longitudinally of the belt and held between the' longitudinally .disposed spaced side members 5-57 which members are composed of rubber. The wear surface l consists of a. series of .parallel layers G of textile. fabric out on the bias, each layer be lill "lcanization are intel-locked one with the otheil the textile layers one to the other forming a biiilt-up wear surface composed of alternate layers of rubber and textile fabric cut on the bias.

Instead of arranging the layers G and 7 at a perpemlirular to the horizontal iayers of the conveyor belt, as in the case of the invention of the aforesaid Letters Patent No. 814416, the same are set oblique'ly or at transverse inclination to the horizontal layers of the body l, each obliquely disposed layer (i overlapping an adjacent .layer of textile fabric.. Ilias-much as the fibers of the layers 6 of the textile fabricare set diagonally, diie to thefact that the material composing the same is cut on the bias, when the said layers so cut on the bias are positioned relatively to each other so that each layer stands at a. transverse inclination to the horizontal layers 2 of the body conveyer belt, there is provided free eX- pansion for the layers 6 longitudinally aiid transversely, so .that the wearing surface expands free vin all directions relative to the body of the belt, the transversedisposition of the layers (i of the conveyer belt being such that all wear which occurs from the friction of the material deposited thereon being substantially and in fact wholly upon the'ends of the said layers, which wear is to a much less extent than would otherwise take place. By arranging the longitudinally disposed parallel layers (3 at an inclination to the horizontal and the' face of one layer overlapping the face of an adjacent layer, the said layers when the members ofthe conveyer belt are assembled andunited by vulaiid the assembled layers 6 give in unison to longitudinal and transverse expansion, consequently, the contraction and expansion of the conveyor belt during the troughing periods thereof has not the effect of tearing or separating the said united layers 6, with thi` result that the material being conveyed does not work between the faces of the longitudinally disposed transversely inclined layers and the life of theA belt is materially prolonged.

The preferred method of manufacturing the improved coiiveyer belt is first to form the body 1 of dough rubber having the horizontal layers 2 of textile fabric embedded therein, and to the horizontal face thereof apply the partially' formed. wear surface consisting of the parallel layers (i of textile fabric cut on the bias separated b v the layers 7 of dough rubber. thel layers 6 being .arranged at an incline to the horizontal with the faces thereof overlapping and the nally disposed wear surf 1 of the same held between longitudinal spaced side members 5 and 5 The members thus assembled are subjected to the usual method for the vulcanization of the dough rubber fort-lie 'uniting of the assembled parts as an integral structure and when so united the composite body l is provided with an upper wear sui-face comprising a series of parallel longitudinally disposed fabric layers cut on the bias and arranged at a transverse inclination to the horizontal surface of the body .l of the conveyer belt. However, any suitable mode of construction may be employed, the only requirement being that when the conveyer .belt is completed as an article of manufacture it shall be' proviiled with a longitudivace consisting of a series of overlapping iiiterlocked layers of fabric cut on the bias arranged at an inclination transverse to the horizontal surface of the body portion.

Having thus described the invention what is claimed as new and desired to be protected by Letters Patent is 1. As an article of manufacture, a conveyer belt having as an integral part and on the upper face thereof a wearing member which constitutes the wearing surface. of the belt, the same comprising a series of longitudinally disposed layers of .textile fabric cut on the bias set at a transverse inclination relative to the horizontal surface of the upper face of the belt and united one to the other so that the face of adjacent members overlap. the said layers being united one to the other by rubber interposed' between the faces thereof and vulcanized.

A wear pad for a conveyer belt, comprising a series of longitudinally layers of textile fabric cut on the bias, set at a transverse inclination to the vhorizontal surface of the wear pad and `united one to the other b v adhesive elastic material interi'iosed tlicrolatweeii so that the faces of adjacent layers overlap. and spaced longitudinally disposed side binding members composed of adhesive elastic material and united lo the outer fabric layers thereby.

3. The combination with a flexible convever belt of a wear pad therefor con'ipris- 'ing a series of longitudinally disposed layers of textile fabric. set vat a transverse inclination to the horizontal surface of the wear pad. and united one to the other so that the faces ol' adjacent layers overlap.

ln testimony whereof I have signed my name to this speciIicat-ion iii-the presence of two .suibscribing witnesses.

lVilililAM I". Boll/ERS. lYitnesses:

llaiun' A. Torri-1N,

D. B. Ricniiuis.

formed of dough rubber.l

di sposcd 

